convert an audiofile mp3 to mpeg 2 L2

david_2911,

I am not familiar with the format you want to convert to but I have liked http://www.dbpoweramp.com/ .  It has worked great for other conversions.  Comes with codecs for the most common but you can add them to add more support.

Let me know if you have any questions or need more information.

b0lsc0tt

You may try this:  SUPER © Simplified Universal Player Encoder & Renderer

After dragging your source file (mp3) to the application.
Simply select the 1. Output Container (MPG/TS/ etc.) -> 2. Video codec (MPEG-II) -> 3. Audio codec (mp3/mp2/etc.)->4. encode~~~

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SUPER © encodes to render in various Multimedia formats.
Any supported input Multimedia file can be encoded (to or from):

          o Drag & drop any Audio file or even any Video/Audio file and EXTRACT the Audio part by converting it to
            aac
            ac3
            amr_nb
            amr_wb
            ape   Monkey's Audio (Lossless)
            mmf
            mp2            mp3
            mpc
            ogg   FLAC (Lossless)
            tta    True Audio (Lossless)
            wv    WavPack (Lossless)
            wav
            wma
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http://www.erightsoft.com/SUPER.html

See above :)